Car stop



y 1935. w. PILKINGTON fi CAR STOP Filed Nov. 10, 1952 INVENTOR.

Willi am 1 ilkingtnn 5m] w m ATTORNEYS.

j durable type of car stop of novel three piece con- Patented July 9, 1935 'UNl-TED'STATES' PATENT OFFICE v CAR STOP 7 William Pilkington, Beckley,- W. Va. 7

Application November 10, 1932, Serial No. 642,093 v 5 Claims; (01, 104-258 a The present invention'relates to improvements car stops-and the primary object of the invention resides in the provision of an improved stop of this character adapted for ready and easy ap- I plicationupon a rail of a 'traokway to form an abutment or chock engageable by a wheel of the rolling stock toprevent travel thereof along the trackway; t 1

Ayfurther object of the invention is to provide a car stop which may be easily placed in position for use at any desired point upon a rail by a'downward movement from above the rail and without requiring that the stop be slipped along therail into position from the end of the rail.

A further object is to provide a strong and struction,- wherein the, three elements forming the stop are so 'joined as to remain in connected relation when the stop is removed from the rail solas to eliminate possible loss of parts.

' A further object is to provide an improved car stop havinga pair of pivotallyjoined rail engagingmembers; 'with' cam acting means for clamping the members to a rail in such manner as to prevent accidental separation of the stop from the rail. i I e p A furtherobject of vthe invention is to providev a car stop wherein the rail engaging portion will grip the rail with a rolling clamping action when engaged at either side by a car wheel. a 1 V A. further. object of the inventionis to provide a car stop, embodying rail gripping portions adapted to be clamped upon the ;rail byv a-clamping lever acting" with a cam action forclosing the rail gripping portions upon therail, with the lever in V such position when the stop is in position upon sides thereof.

. Figure 2 isa central vertical section through thezstop and showing the manner'in which the stop maybe placed upon the rail by a downward movement; with theheadl of the rail acting {to-spread the rail engaging members.

Figures 3 and'4 are vertical sections on the respective lines, in Figure 5. i V L Figure 5 is a top plan view of the stop in posi-, tion upon the rail, 7

Referring to the drawing in detail, and wherein similar reference characters designate corresponding parts throughout the several views; the improved'ca'rstop comprises a pair of stop plates or rail engagingrmembers 6 and 8, and a closing or clamping member '9 acting witha cam action to close the stop plates upon the rail A. The rail A is of the usual construction embodying the head Ill; web I I and-base flange I2. 'The' stop plates 6 and8 are of'general-rectangular' shape in plan and are held against separation by the closing member 9. r i i V Referring first to the specific'formation of the stop plate 6, the sameis formed with a platelike body portion 13 having an outwardly off set portionll l at its lower end providing a transverse way I'5 adapted to receive an edge portion of the rail head Ill. Below the outwardly offset portion; M, the stop plate is formed with a grip portion l6, preferably having a-flat inner surface extending parallel to but outwardly offset from .the flat innersurface of the body portion l3.

The stop plate 8-isforme'd with a body portion I3 having at its'lower end an outwardly offset portion l4 providing at the inner side of the stop platea transverse way I 5' disposed in confronting relation to the transverse way l5 of the companion stop plate 6. Provided at the lower end of thestop plate 8 is a grip portion l6 having a fiat inner surface-arranged parallel to but offset in a plane outwardly from the flat inner surface of the body portion l3.

' Thestop plates -6 and 8 are pivotally joined at their upper endsby a slip hinge joint eliminating the use of hinge pins andyet'preventing separation of the stop platesduring spreading and closing movement of the plates:- The upper end of the plate portion I3 is mortised or notched out as at l8 with the ends of the mortise terminating inwardly of theside edges of-the plate portion andproviding ears IS. The base of this mortise i8 is rounded or: as shown at in Figure 2 to provide a bearing for a tongue 2| provided on the upper end of-the platebody portion l3. (This tongue 2| as will be observed in Figure 5 extends between the ears i9, and this tongue has its under surface rounded out longitudinally of the tongue to conform to the bearing surface 20. Thus, an-interlocking slip hinge joint is formed at the upper ends of the" stop plates permitting pivoting of the plates at their upper ends and preventing relative lateral movement of the plates.

The stop plate body portion 13 is provided at its lower end with a circular opening 22 adapted to align with a circular opening 22 provided in the lower end of the stop plate portion l3 when the stop plates are closed upon one another.

Provided at the outer side of the stop plate 8 is a cam portion providing an inclined cam surface 24 extending in upwardly converging relation to the inner surface of the plate portion 13'. This cam surface 24 extends above and below the circular opening 22' as is clearly shown in Figure 1, and the closing or clamping member 9 is intended to co-act with this cam surface for closing the stop plates upon the rail.

The closing or clamping member 9 is preferably in the form of a clamping lever and embodies a coupling pin portion 25 extending loosely through the openings 22 and 22' and having its free end upset into a head 26 outwardly of the stop plate 6. The opposite end of the pin portion 25 is provided with a right angularly offset crank arm 21 preferably of circular formation and provided at its free end with a suitable grip portion or handle 28. -The coupling pin portion 25 forming the pivot for the clamping member is of sufficient length to permit spreading of the stop plates at their lower ends to an extent whereby .the plates may be slipped downwardly over the rail head as shown in Figure 2. In order to permit this spreading of the lower end of the stop plates, the plate portion 13 is provided at its outer side with a vertical channel or groove which extends from the opening 22' to the upper end of the stop plate. This channel 30 receives the crank'arm 21 when the stop plates are spread and serves to prevent rotation of the clamping member 9 while placing and removing the car stop with respect to a rail. As shown in Figure 2, the crank arm 21 is held in an upright position through its engagement with the lower portion of the channel 30. In assembling the stop, the tongue 2| is placed in the mortise l8 and then the pivot pin 25 inserted through the openings 22 and 22' and upset as at 26. Thus the tongue 2| and pin 25 act jointly to retain the stop plates in assembled relation and permit spreading of theplates at their lower ends.

The transverse ways 15 and I5 for receiving the rail head I!) are provided at their upper and lower edges with oppositely arcuated gripping surfaces 35, the upper gripping surfaces adapted to have rolling contact with the upper or tread surface of the rail head and the lower gripping surfaces adaptedto have rolling contact with the under surfaces of the rail head at opposite sides'of the web II. These oppositely arcuated gripping surfaces permit limited rocking movement of the car stops in a direction longitudinally of the rail A so that a clamping action upon the rail is provided when the stop is engaged by a car wheel at either side thereof.

In applying the car stop for use, the crank arm 21 is first swung upwardly to align with the groove 30 and the stop plates 6 and 8 spread sufficiently to allow the grip portions l6 and 16 to slip over'the rail head Ill. The stop plates will then spread automatically as the stop is lowered until the rail head is received in the confronting waysor channels 15 and I 5. In this position, the stop plate will be resting upon the arcuate gripping surfaces 35. at the upper side of the transverse ways and limit downward movement of the stop. The clamping member 9 is then rotated about the pin 25 as an axis and as the crank arm 21 moves over the inclined cam surface 24, the stop plates will be drawn together with the rail heads engaging the ways 15 and 15'. When in this position of use upon the rail, the weight of the free end of the crank arm 21 prevents accidental opening of the stop plates due to vibration or other causes. As will be observedin Figure 1, it is necessary to turn the crank arm 21 upwardly for releasing the stop from the rail.

When a car Wheel engages the upper portion of the stop plates, the plates will grip the rail with a rolling clamping action due to the arrangement of arcuate gripping surfaces 35 and prevent the stop from being slid along the rail. This clamping action will be increased in proportion to the force applied to the upper connected ends of the stop plates by a car wheel. It may here be well to state that the crank arm 21 may be swung to either side of the vertical groove 30 to engage the inclined cam surface 24 for closing the stop plates.

The rolling clamping action of the surfaces 35 with the rail head through the slight rocking action of the stop plates when engaged by a car Wheel, dispenses with any biting in action of the car stop tending to raise burrs upon the tread of the track. By having the car stop of such construction that the same may be placed upon the rail by a downward movement from above the rail, permits the stop to be placed at either side of the wheels of rolling stock, and the specific formation of the gripping surfaces 35 permits proper functioning of the stop when rocked in either direction longitudinally of the rail by the car wheel. The transverse ways or channels 15 and I5 are preferably of such depth as to not bindingly engage the side edges of the rail head along their base surfaces when the confronting surfaces of the plate body portions I3 and I3 contact.

From the'foregoing description it will be apparent that an improved type of car stop has been provided embodying a minimum number of parts and having a construction permitting ready and easy placing of the stop in position for use at any desired point upon a rail by a downward movement from above the rail. It will further be apparent that a novel arrangement is provided for applying the stop wi th a clamping action upon the rail and in a manner to prevent accidental displacement of the stop plates. It will further be apparent that an arrangement is provided wherein the stop grips the rail with a rolling clamping action when engaged at either side by a car wheel.

Changes in detail may be made to the form of invention herein shown and described, without departing from the spirit of the invention or the scope of the following claims.

I claim:

1. A car stop for trackway rails, comprising a pair of rail engaging members for positioning in straddled relation downwardly over the rail, and means acting with a cam action for closing the members upon the rail, said members having limited rocking movement longitudinally of the rail with a rolling clamping action upon the rail.

2. A car stop for rails of trackways comprising a pair of stop plates having transverse ways at their confronting faces each provided with oppositely arcuated gripping surfaces for rolling contact with the upper andlower sides of a rail head, means connecting the plates at their upper ends,

and means for closing the plates'at their lower ends upon a rail. J

3. A car'stop for trackway rails, comprising a pair of stop plates hingedly joined at their upper ends, saidplates each having confronting, oppositely arcuated gripping surfaces for rolling contact with the head of the rail, and means for closing the plates upon the rail.

4.' A car stop for rails of trackways comprising a pair of stop plates having confronting transverse ways for receiving the head of a rail, interlocking hinge joint means connecting the upper ends of the plates, said plates each having a circular opening above the transverse ways, a cam projection at the outer side .of one of the plates at the opening therein and providing a cam surface extending above and below the opening, and av closing member for the plates embodying a coupling pin portion loosely rotatable in said openings and a crank arm at one end of the pin engageable with the cam surface when swung downwardly for closing the plates upon a rail, the

other end of the pin portion being enlarged to prevent withdrawal through the openings.

5. A car stop comprising a companion pair of stop plates having rail engaging portions at their lower ends for rolling clamping engagement with the rail head, an interlocking hinge joint connecting the upper ends of the plates, and a closure member for closing the plates with a cam action,

said closure member being rotatable in the plates and acting to limit spreading of the plates at 15 their lower ends. v

WILLIAM, PILKINGTON. 

